Electrical switchgear
AssigneeABB Patent GmbH
InventorsJürgen Christmann, Ralf Weber
Life of this patent
Estimating the term…
Abstract
An electrical switchgear includes a thermal trip, an electromagnetic trip, and a switching mechanism with a latching point and at least one contact point that is continuously opened or closed. An operating handle is connected to one end of a lug by means of a coupling element and the other end of the lug is coupled to a contact base that carries a moving contact member. The thermal trip is coupled to a trip lever by a connecting rod that passes over the contact base so that both the thermal trip and the electromagnetic trip open a latching point in the event of an excess current and/or short circuit current.
Claims5
An electrical switchgear, comprising:
- a thermal trip, and an electromagnetic trip;
- a switching mechanism with a latching point;
- at least one contact point which is continuously opened or closed by means of the switching mechanism;
- an operating handle which is connected to one end of a lug by a coupling element and another end of the lug which is coupled to a contact base carrying a moving contact member;
- a latch lever which, together with a rotatably supported trip lever that interacts with the electromagnetic trip and the thermal trip, forms the latching point,
- wherein the trip lever includes an axle, a first arm, and a second arm, the first arm extending from the axle in a direction towards the latch lever and the second arm extends from the axle in a direction towards the electromagnetic trip and the thermal trip, the first arm having a recess that mates with a nose of the latch lever to form the latching point,
- wherein the contact base for the moving contact member is located between the thermal trip and the electromagnetic trip, and
- wherein the thermal trip is coupled to the trip lever by a connecting rod that passes over the contact base, so that both the thermal trip and the electromagnetic trip open the latching point in an event of an excess current and/or short circuit current.
Dependencies are inferred from the claim text.